Pipe joints or couplings – With assembly means or feature – Particular tool-engaging means or with tool
Patent
1989-07-27
1991-09-17
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Particular tool-engaging means or with tool
285175, 285330, 285333, 285369, 285913, 403118, F16L 3500
Patent
active
050488716
ABSTRACT:
A screwed pipe joint with a bell for connecting two pipes of a drill pipe string. The screwed pipe joint includes, in opposed relation, a first pipe having a first tapered threaded end (10) and a second pipe having a second tapered threaded end (11), the first tapered pipe end and the second tapered pipe end having a different taper and pitch, and being shaped so that when the pipes are joined they are form-locked and having an axial clearance (23, 23') therebetween; and a bell having a first and second threaded section (7, 8) complementary to and for engagement with the first and second threaded pipe ends, and an unthreaded section (9) therebetween and a radially inward projecting shoulder (24) on the unthreaded section (9) of the bell (6) opposite the first pipe (2); the first and second pipe ends having respective annular recesses (14, 13) therein defining, with the unthreaded bell section (9), an annular space (15) therebetween; a sealing sleeve within the annular space (15) having an outside diameter smaller than the inside diameter of the unthreaded section (9) of the bell (6) and being axially fixed in the recess (14) of the first pipe end.
REFERENCES:
patent: 1474905 (1923-11-01), Keszthelyi
patent: 1781091 (1930-11-01), Wilson
patent: 2380690 (1945-07-01), Graham
patent: 2465027 (1949-03-01), McManaway
patent: 4341481 (1982-07-01), Wollensak
patent: 4341482 (1982-07-01), Wollensak
patent: 4366971 (1983-01-01), Lula
patent: 4397484 (1983-08-01), Miller
patent: 4398754 (1983-08-01), Caroleo et al.
patent: 4679831 (1987-07-01), Kielminski
patent: 4706997 (1987-11-01), Carstensen
Krug Gerhard
Lenze Friedrich
Pfeiffer Gerd
Quadflieg Erich
Siekmeyer Josef
Arola Dave W.
Bordas Carol I.
Mannesmann Aktiengesellschaft
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